https://freemarker.apache.org/: FreeMarker is a "template engine"; a generic tool to generate text output based on templates. (Apache Software Foundation) 
final class freemarker.core.RegexpHelper
  minor version: 0
  major version: 59
  flags: flags: (0x0030) ACC_FINAL, ACC_SUPER
  this_class: freemarker.core.RegexpHelper
  super_class: java.lang.Object
{
  private static final freemarker.log.Logger LOG;
    descriptor: Lfreemarker/log/Logger;
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL

  private static volatile boolean flagWarningsEnabled;
    descriptor: Z
    flags: (0x004a) ACC_PRIVATE, ACC_STATIC, ACC_VOLATILE

  private static final int MAX_FLAG_WARNINGS_LOGGED;
    descriptor: I
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    ConstantValue: 25

  private static final java.lang.Object flagWarningsCntSync;
    descriptor: Ljava/lang/Object;
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL

  private static int flagWarningsCnt;
    descriptor: I
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC

  private static final freemarker.cache.MruCacheStorage patternCache;
    descriptor: Lfreemarker/cache/MruCacheStorage;
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL

  static final long RE_FLAG_CASE_INSENSITIVE;
    descriptor: J
    flags: (0x0018) ACC_STATIC, ACC_FINAL

  static final long RE_FLAG_MULTILINE;
    descriptor: J
    flags: (0x0018) ACC_STATIC, ACC_FINAL

  static final long RE_FLAG_COMMENTS;
    descriptor: J
    flags: (0x0018) ACC_STATIC, ACC_FINAL

  static final long RE_FLAG_DOTALL;
    descriptor: J
    flags: (0x0018) ACC_STATIC, ACC_FINAL

  static final long RE_FLAG_REGEXP;
    descriptor: J
    flags: (0x0018) ACC_STATIC, ACC_FINAL
    ConstantValue: 4294967296

  static final long RE_FLAG_FIRST_ONLY;
    descriptor: J
    flags: (0x0018) ACC_STATIC, ACC_FINAL
    ConstantValue: 8589934592

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=4, locals=0, args_size=0
         0: .line 35
            ldc "freemarker.runtime"
            invokestatic freemarker.log.Logger.getLogger:(Ljava/lang/String;)Lfreemarker/log/Logger;
            putstatic freemarker.core.RegexpHelper.LOG:Lfreemarker/log/Logger;
         1: .line 37
            getstatic freemarker.core.RegexpHelper.LOG:Lfreemarker/log/Logger;
            invokevirtual freemarker.log.Logger.isWarnEnabled:()Z
            putstatic freemarker.core.RegexpHelper.flagWarningsEnabled:Z
         2: .line 39
            new java.lang.Object
            dup
            invokespecial java.lang.Object.<init>:()V
            putstatic freemarker.core.RegexpHelper.flagWarningsCntSync:Ljava/lang/Object;
         3: .line 42
            new freemarker.cache.MruCacheStorage
            dup
            bipush 50
            sipush 150
            invokespecial freemarker.cache.MruCacheStorage.<init>:(II)V
            putstatic freemarker.core.RegexpHelper.patternCache:Lfreemarker/cache/MruCacheStorage;
         4: .line 49
            iconst_2
            invokestatic freemarker.core.RegexpHelper.intFlagToLong:(I)J
            putstatic freemarker.core.RegexpHelper.RE_FLAG_CASE_INSENSITIVE:J
         5: .line 51
            bipush 8
            invokestatic freemarker.core.RegexpHelper.intFlagToLong:(I)J
            putstatic freemarker.core.RegexpHelper.RE_FLAG_MULTILINE:J
         6: .line 53
            iconst_4
            invokestatic freemarker.core.RegexpHelper.intFlagToLong:(I)J
            putstatic freemarker.core.RegexpHelper.RE_FLAG_COMMENTS:J
         7: .line 55
            bipush 32
            invokestatic freemarker.core.RegexpHelper.intFlagToLong:(I)J
            putstatic freemarker.core.RegexpHelper.RE_FLAG_DOTALL:J
         8: .line 60
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  private static long intFlagToLong(int);
    descriptor: (I)J
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC
    Code:
      stack=4, locals=1, args_size=1
        start local 0 // int flag
         0: .line 45
            iload 0 /* flag */
            i2l
            ldc 65535
            land
            lreturn
        end local 0 // int flag
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  flag  I
    MethodParameters:
      Name  Flags
      flag  

  private void <init>();
    descriptor: ()V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // freemarker.core.RegexpHelper this
         0: .line 63
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // freemarker.core.RegexpHelper this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lfreemarker/core/RegexpHelper;

  static java.util.regex.Pattern getPattern(java.lang.String, int);
    descriptor: (Ljava/lang/String;I)Ljava/util/regex/Pattern;
    flags: (0x0008) ACC_STATIC
    Code:
      stack=9, locals=5, args_size=2
        start local 0 // java.lang.String patternString
        start local 1 // int flags
         0: .line 67
            new freemarker.core.RegexpHelper$PatternCacheKey
            dup
            aload 0 /* patternString */
            iload 1 /* flags */
            invokespecial freemarker.core.RegexpHelper$PatternCacheKey.<init>:(Ljava/lang/String;I)V
            astore 2 /* patternKey */
        start local 2 // freemarker.core.RegexpHelper$PatternCacheKey patternKey
         1: .line 71
            getstatic freemarker.core.RegexpHelper.patternCache:Lfreemarker/cache/MruCacheStorage;
            dup
            astore 4
            monitorenter
         2: .line 72
            getstatic freemarker.core.RegexpHelper.patternCache:Lfreemarker/cache/MruCacheStorage;
            aload 2 /* patternKey */
            invokevirtual freemarker.cache.MruCacheStorage.get:(Ljava/lang/Object;)Ljava/lang/Object;
            checkcast java.util.regex.Pattern
            astore 3 /* result */
        start local 3 // java.util.regex.Pattern result
         3: .line 71
            aload 4
            monitorexit
         4: goto 7
        end local 3 // java.util.regex.Pattern result
      StackMap locals: java.lang.String int freemarker.core.RegexpHelper$PatternCacheKey top freemarker.cache.MruCacheStorage
      StackMap stack: java.lang.Throwable
         5: aload 4
            monitorexit
         6: athrow
        start local 3 // java.util.regex.Pattern result
         7: .line 74
      StackMap locals: java.lang.String int freemarker.core.RegexpHelper$PatternCacheKey java.util.regex.Pattern
      StackMap stack:
            aload 3 /* result */
            ifnull 9
         8: .line 75
            aload 3 /* result */
            areturn
         9: .line 79
      StackMap locals:
      StackMap stack:
            aload 0 /* patternString */
            iload 1 /* flags */
            invokestatic java.util.regex.Pattern.compile:(Ljava/lang/String;I)Ljava/util/regex/Pattern;
            astore 3 /* result */
        10: .line 80
            goto 15
      StackMap locals:
      StackMap stack: java.util.regex.PatternSyntaxException
        11: astore 4 /* e */
        start local 4 // java.util.regex.PatternSyntaxException e
        12: .line 81
            new freemarker.core._TemplateModelException
            dup
            aload 4 /* e */
            iconst_2
            anewarray java.lang.Object
            dup
            iconst_0
        13: .line 82
            ldc "Malformed regular expression: "
            aastore
            dup
            iconst_1
            new freemarker.core._DelayedGetMessage
            dup
            aload 4 /* e */
            invokespecial freemarker.core._DelayedGetMessage.<init>:(Ljava/lang/Throwable;)V
        14: .line 81
            aastore
            invokespecial freemarker.core._TemplateModelException.<init>:(Ljava/lang/Throwable;[Ljava/lang/Object;)V
            athrow
        end local 4 // java.util.regex.PatternSyntaxException e
        15: .line 84
      StackMap locals:
      StackMap stack:
            getstatic freemarker.core.RegexpHelper.patternCache:Lfreemarker/cache/MruCacheStorage;
            dup
            astore 4
            monitorenter
        16: .line 85
            getstatic freemarker.core.RegexpHelper.patternCache:Lfreemarker/cache/MruCacheStorage;
            aload 2 /* patternKey */
            aload 3 /* result */
            invokevirtual freemarker.cache.MruCacheStorage.put:(Ljava/lang/Object;Ljava/lang/Object;)V
        17: .line 84
            aload 4
            monitorexit
        18: goto 21
      StackMap locals: java.lang.String int freemarker.core.RegexpHelper$PatternCacheKey java.util.regex.Pattern freemarker.cache.MruCacheStorage
      StackMap stack: java.lang.Throwable
        19: aload 4
            monitorexit
        20: athrow
        21: .line 87
      StackMap locals:
      StackMap stack:
            aload 3 /* result */
            areturn
        end local 3 // java.util.regex.Pattern result
        end local 2 // freemarker.core.RegexpHelper$PatternCacheKey patternKey
        end local 1 // int flags
        end local 0 // java.lang.String patternString
      LocalVariableTable:
        Start  End  Slot           Name  Signature
            0   22     0  patternString  Ljava/lang/String;
            0   22     1          flags  I
            1   22     2     patternKey  Lfreemarker/core/RegexpHelper$PatternCacheKey;
            3    5     3         result  Ljava/util/regex/Pattern;
            7   22     3         result  Ljava/util/regex/Pattern;
           12   15     4              e  Ljava/util/regex/PatternSyntaxException;
      Exception table:
        from    to  target  type
           2     4       5  any
           5     6       5  any
           9    10      11  Class java.util.regex.PatternSyntaxException
          16    18      19  any
          19    20      19  any
    Exceptions:
      throws freemarker.template.TemplateModelException
    MethodParameters:
               Name  Flags
      patternString  
      flags          

  static long parseFlagString(java.lang.String);
    descriptor: (Ljava/lang/String;)J
    flags: (0x0008) ACC_STATIC
    Code:
      stack=4, locals=5, args_size=1
        start local 0 // java.lang.String flagString
         0: .line 120
            lconst_0
            lstore 1 /* flags */
        start local 1 // long flags
         1: .line 121
            iconst_0
            istore 3 /* i */
        start local 3 // int i
         2: goto 23
         3: .line 122
      StackMap locals: long int
      StackMap stack:
            aload 0 /* flagString */
            iload 3 /* i */
            invokevirtual java.lang.String.charAt:(I)C
            istore 4 /* c */
        start local 4 // char c
         4: .line 123
            iload 4 /* c */
            lookupswitch { // 6
                   99: 9
                  102: 15
                  105: 5
                  109: 7
                  114: 13
                  115: 11
              default: 17
          }
         5: .line 125
      StackMap locals: int
      StackMap stack:
            lload 1 /* flags */
            getstatic freemarker.core.RegexpHelper.RE_FLAG_CASE_INSENSITIVE:J
            lor
            lstore 1 /* flags */
         6: .line 126
            goto 22
         7: .line 128
      StackMap locals:
      StackMap stack:
            lload 1 /* flags */
            getstatic freemarker.core.RegexpHelper.RE_FLAG_MULTILINE:J
            lor
            lstore 1 /* flags */
         8: .line 129
            goto 22
         9: .line 131
      StackMap locals:
      StackMap stack:
            lload 1 /* flags */
            getstatic freemarker.core.RegexpHelper.RE_FLAG_COMMENTS:J
            lor
            lstore 1 /* flags */
        10: .line 132
            goto 22
        11: .line 134
      StackMap locals:
      StackMap stack:
            lload 1 /* flags */
            getstatic freemarker.core.RegexpHelper.RE_FLAG_DOTALL:J
            lor
            lstore 1 /* flags */
        12: .line 135
            goto 22
        13: .line 137
      StackMap locals:
      StackMap stack:
            lload 1 /* flags */
            ldc 4294967296
            lor
            lstore 1 /* flags */
        14: .line 138
            goto 22
        15: .line 140
      StackMap locals:
      StackMap stack:
            lload 1 /* flags */
            ldc 8589934592
            lor
            lstore 1 /* flags */
        16: .line 141
            goto 22
        17: .line 143
      StackMap locals:
      StackMap stack:
            getstatic freemarker.core.RegexpHelper.flagWarningsEnabled:Z
            ifeq 22
        18: .line 145
            new java.lang.StringBuilder
            dup
            ldc "Unrecognized regular expression flag: "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
        19: .line 146
            iload 4 /* c */
            invokestatic java.lang.String.valueOf:(C)Ljava/lang/String;
            invokestatic freemarker.template.utility.StringUtil.jQuote:(Ljava/lang/String;)Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            ldc "."
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
        20: .line 145
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
        21: .line 144
            invokestatic freemarker.core.RegexpHelper.logFlagWarning:(Ljava/lang/String;)V
        end local 4 // char c
        22: .line 121
      StackMap locals:
      StackMap stack:
            iinc 3 /* i */ 1
      StackMap locals:
      StackMap stack:
        23: iload 3 /* i */
            aload 0 /* flagString */
            invokevirtual java.lang.String.length:()I
            if_icmplt 3
        end local 3 // int i
        24: .line 150
            lload 1 /* flags */
            lreturn
        end local 1 // long flags
        end local 0 // java.lang.String flagString
      LocalVariableTable:
        Start  End  Slot        Name  Signature
            0   25     0  flagString  Ljava/lang/String;
            1   25     1       flags  J
            2   24     3           i  I
            4   22     4           c  C
    MethodParameters:
            Name  Flags
      flagString  

  static void logFlagWarning(java.lang.String);
    descriptor: (Ljava/lang/String;)V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=3, locals=3, args_size=1
        start local 0 // java.lang.String message
         0: .line 158
            getstatic freemarker.core.RegexpHelper.flagWarningsEnabled:Z
            ifne 1
            return
         1: .line 161
      StackMap locals:
      StackMap stack:
            getstatic freemarker.core.RegexpHelper.flagWarningsCntSync:Ljava/lang/Object;
            dup
            astore 2
            monitorenter
         2: .line 162
            getstatic freemarker.core.RegexpHelper.flagWarningsCnt:I
            istore 1 /* cnt */
        start local 1 // int cnt
         3: .line 163
            iload 1 /* cnt */
            bipush 25
            if_icmpge 6
         4: .line 164
            getstatic freemarker.core.RegexpHelper.flagWarningsCnt:I
            iconst_1
            iadd
            putstatic freemarker.core.RegexpHelper.flagWarningsCnt:I
         5: .line 165
            goto 9
         6: .line 166
      StackMap locals: int java.lang.Object
      StackMap stack:
            iconst_0
            putstatic freemarker.core.RegexpHelper.flagWarningsEnabled:Z
         7: .line 167
            aload 2
            monitorexit
         8: return
         9: .line 161
      StackMap locals:
      StackMap stack:
            aload 2
            monitorexit
        10: goto 13
        end local 1 // int cnt
      StackMap locals: java.lang.String top java.lang.Object
      StackMap stack: java.lang.Throwable
        11: aload 2
            monitorexit
        12: athrow
        start local 1 // int cnt
        13: .line 170
      StackMap locals: java.lang.String int
      StackMap stack:
            new java.lang.StringBuilder
            dup
            aload 0 /* message */
            invokestatic java.lang.String.valueOf:(Ljava/lang/Object;)Ljava/lang/String;
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            ldc " This will be an error in some later FreeMarker version!"
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            astore 0 /* message */
        14: .line 171
            iload 1 /* cnt */
            iconst_1
            iadd
            bipush 25
            if_icmpne 16
        15: .line 172
            new java.lang.StringBuilder
            dup
            aload 0 /* message */
            invokestatic java.lang.String.valueOf:(Ljava/lang/Object;)Ljava/lang/String;
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            ldc " [Will not log more regular expression flag problems until restart!]"
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            astore 0 /* message */
        16: .line 174
      StackMap locals:
      StackMap stack:
            getstatic freemarker.core.RegexpHelper.LOG:Lfreemarker/log/Logger;
            aload 0 /* message */
            invokevirtual freemarker.log.Logger.warn:(Ljava/lang/String;)V
        17: .line 175
            return
        end local 1 // int cnt
        end local 0 // java.lang.String message
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0   18     0  message  Ljava/lang/String;
            3   11     1      cnt  I
           13   18     1      cnt  I
      Exception table:
        from    to  target  type
           2     8      11  any
           9    10      11  any
          11    12      11  any
    MethodParameters:
         Name  Flags
      message  

  static void checkNonRegexpFlags(java.lang.String, long);
    descriptor: (Ljava/lang/String;J)V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=4, locals=3, args_size=2
        start local 0 // java.lang.String biName
        start local 1 // long flags
         0: .line 178
            aload 0 /* biName */
            lload 1 /* flags */
            iconst_0
            invokestatic freemarker.core.RegexpHelper.checkOnlyHasNonRegexpFlags:(Ljava/lang/String;JZ)V
         1: .line 179
            return
        end local 1 // long flags
        end local 0 // java.lang.String biName
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    2     0  biName  Ljava/lang/String;
            0    2     1   flags  J
    Exceptions:
      throws freemarker.core._TemplateModelException
    MethodParameters:
        Name  Flags
      biName  
      flags   

  static void checkOnlyHasNonRegexpFlags(java.lang.String, long, boolean);
    descriptor: (Ljava/lang/String;JZ)V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=4, locals=6, args_size=3
        start local 0 // java.lang.String biName
        start local 1 // long flags
        start local 3 // boolean strict
         0: .line 183
            iload 3 /* strict */
            ifne 1
            getstatic freemarker.core.RegexpHelper.flagWarningsEnabled:Z
            ifne 1
            return
         1: .line 186
      StackMap locals:
      StackMap stack:
            lload 1 /* flags */
            getstatic freemarker.core.RegexpHelper.RE_FLAG_MULTILINE:J
            land
            lconst_0
            lcmp
            ifeq 4
         2: .line 187
            ldc "m"
            astore 4 /* flag */
        start local 4 // java.lang.String flag
         3: .line 188
            goto 11
        end local 4 // java.lang.String flag
      StackMap locals:
      StackMap stack:
         4: lload 1 /* flags */
            getstatic freemarker.core.RegexpHelper.RE_FLAG_DOTALL:J
            land
            lconst_0
            lcmp
            ifeq 7
         5: .line 189
            ldc "s"
            astore 4 /* flag */
        start local 4 // java.lang.String flag
         6: .line 190
            goto 11
        end local 4 // java.lang.String flag
      StackMap locals:
      StackMap stack:
         7: lload 1 /* flags */
            getstatic freemarker.core.RegexpHelper.RE_FLAG_COMMENTS:J
            land
            lconst_0
            lcmp
            ifeq 10
         8: .line 191
            ldc "c"
            astore 4 /* flag */
        start local 4 // java.lang.String flag
         9: .line 192
            goto 11
        end local 4 // java.lang.String flag
        10: .line 193
      StackMap locals:
      StackMap stack:
            return
        start local 4 // java.lang.String flag
        11: .line 196
      StackMap locals: java.lang.String
      StackMap stack:
            iconst_5
            anewarray java.lang.Object
            dup
            iconst_0
            ldc "?"
            aastore
            dup
            iconst_1
            aload 0 /* biName */
            aastore
            dup
            iconst_2
            ldc " doesn't support the \""
            aastore
            dup
            iconst_3
            aload 4 /* flag */
            aastore
            dup
            iconst_4
            ldc "\" flag without the \"r\" flag."
            aastore
            astore 5 /* msg */
        start local 5 // java.lang.Object[] msg
        12: .line 198
            iload 3 /* strict */
            ifeq 14
        13: .line 199
            new freemarker.core._TemplateModelException
            dup
            aload 5 /* msg */
            invokespecial freemarker.core._TemplateModelException.<init>:([Ljava/lang/Object;)V
            athrow
        14: .line 202
      StackMap locals: java.lang.Object[]
      StackMap stack:
            new freemarker.core._ErrorDescriptionBuilder
            dup
            aload 5 /* msg */
            invokespecial freemarker.core._ErrorDescriptionBuilder.<init>:([Ljava/lang/Object;)V
            invokevirtual freemarker.core._ErrorDescriptionBuilder.toString:()Ljava/lang/String;
            invokestatic freemarker.core.RegexpHelper.logFlagWarning:(Ljava/lang/String;)V
        15: .line 204
            return
        end local 5 // java.lang.Object[] msg
        end local 4 // java.lang.String flag
        end local 3 // boolean strict
        end local 1 // long flags
        end local 0 // java.lang.String biName
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0   16     0  biName  Ljava/lang/String;
            0   16     1   flags  J
            0   16     3  strict  Z
            3    4     4    flag  Ljava/lang/String;
            6    7     4    flag  Ljava/lang/String;
            9   10     4    flag  Ljava/lang/String;
           11   16     4    flag  Ljava/lang/String;
           12   16     5     msg  [Ljava/lang/Object;
    Exceptions:
      throws freemarker.core._TemplateModelException
    MethodParameters:
        Name  Flags
      biName  
      flags   
      strict  
}
SourceFile: "RegexpHelper.java"
NestMembers:
  freemarker.core.RegexpHelper$PatternCacheKey
InnerClasses:
  private PatternCacheKey = freemarker.core.RegexpHelper$PatternCacheKey of freemarker.core.RegexpHelper